全并联AT+供电牵引网阻抗计算.pdfVIP

电力系统及其自动化 ·893 · 全并联 AT 供电牵引网阻抗计算 林国松 李群湛 西南交通大学电气工程学院 四川 成都 610031 【摘 要】 电力牵引网有直接、BT 和 AT 供电方式，我国高速电气化铁路采用全并联 AT 供电方式。 很多文献分析了常规 AT 供电牵引网阻抗，如广义对称分量法 [1] 、当量等值电路法[2] 。由 于全并联 AT 供电牵引网是新型供电方式，本文根据牵 引网特征，采用广义对称分量法， 求取牵引网阻抗，并按某牵引网的阻抗参数，以曲线形式简要说明该供电方式下的阻抗特 性。同时表明，广义对称分量法可 以作为一种较好的工具分析全并联 AT 供电牵引网。最 后提出关于该类型供电牵引网相关保护和测距的建议。 【关键词】 全并联 AT 供电牵引网 广义对称分量法 Impedance Calculation of AT Power Traction Network with Parallel Connection Lin Guosong Li Qunzhan School of Electrical Eng ，Southwest Jiaotong University ，Chengdu 610031 ，Sichuan ，China Abstract ：The types of power traction network is various ，such as direct mode ，BT （boost transformer ） mode and AT （auto-transformer ）mode. A new mode of AT power traction network with parallel connection will be used to high-speed electrified railways in our country. The impedance of normal AT power traction network was analyzed in many documents with some methods ，such as generalized method of symmetrical components ，equivalent circuit method. AT power traction network with parallel connection is a new mode for power supply. According to the characteristic of this type of power traction network ，the impedance was calculated. The impedance characteristic was showed with graph in briefly based on the parameters of one power traction network. The method is simple and be a good tool adapt to analyzing AT power traction network with parallel connection. At last ，suggestion about relay protection and fault lo